Themed issue: Dynamic behaviour and reactivity in crystalline solids

CrystEngComm‘s themed issue on Dynamic behaviour and reactivity in crystalline solids is now online!

The issue is guest edited by Graeme Day and Tomislav Friščić from Cambridge University. Read their editorial, Dynamic behaviour in the solid state.

An editorial by Prof Sir John Meurig Thomas is also included in the issue, and his perspective on Crystal engineering: origins, early adventures and some current trends, is well worth reading.

Other articles include:

Drug-drug co-crystals: Temperature-dependent proton mobility in the molecular complex of isoniazid with 4-aminosalicylic acid
Pawel Grobelny, Arijit Mukherjee and Gautam R. Desiraju

Are glycine cyclic dimers stable in aqueous solution?
Said Hamad and C. Richard A. Catlow

Solid-state synthesis of mixed trihalides via reversible absorption of dihalogens by non porous onium salts
L. Meazza, J. Martí-Rujas, G. Terraneo, C. Castiglioni, A. Milani, T. Pilati, Pierangelo Metrangolo and Giuseppe Resnati

View all the articles in Issue 13, 2011.

Find out more about our guest editors by visiting their websites (Dr Day, Dr Friščić,) or reading this CrystEngCommunity interview with Graeme Day.

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HOT article: Crystalline perfection

Lithium niobate (LN), a nonlinear optical  material in its single crystal form, is well proven as a potential and unique material for its use in advanced photonic device applications like second-harmonic generation, optical switching, optical modulators, holographic data storage, acousto-optic and ferroelectric. The transition and rare earth metal ions (Fe, Mn, Cuand Ce) improve the data storage capabilities of LN by improving its photorefraction efficiency. However, when the concentration of dopants in the crystal increase, high geometric strains develop in the lattice resulting in the agglomeration of point defects, the formation of dislocations finally leading to structural boundaries. These defects mask or partially/completely deteriorate some of the anisotropic physical properties of the single crystals and reduce the efficiency of the devices made out of these crystals.

In this HOT article, a very detailed account of a novel technique for producing optical quality single crystals of doped lithium niobate is presented. The authors have grown Fe doped LiNbO3 single crystals using an indigenously developed Czochralski growth setup. In order to achieve good quality crystals (free from structural defects, voids and grain boundaries) from the Czochralski method they have used a post growth cooling technique. Additionally they have evaluated the potential of the material for use in optical devices and shown it to be “fit for purpose”.

Read more for FREE at:

Crystalline perfection, EPR, prism coupler and UV-VIS-NIR studies on Cz-grown Fe-doped LiNbO3: A photorefractive nonlinear optical crystal
Satya Kumar Kushwaha, Kamlesh Kumar Maurya, Narayanasamy Vijayan and Godavarthi Bhagavannarayana
CrystEngComm, 2011, Advance Article
DOI: 10.1039/C0CE00892C

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HOT article: Nanorods make a stand

In this HOT article, ZnO nanorods were helped to “stand” vertically on microsubstrates by an interesting seed-mediated approach. Taking ZnO nanosheets as the microsubstrates, ZnO nanorods can grow vertically, not lying horizontally, on the facets with the aid of a seed layer precoating to form hierarchical ZnO nanorod-nanosheet architectures. The diameter as well as the length of the standing nanorods can be controlled effectively by adjusting the growth time and the amount of ammonia in the growth solution. The precoated seed layer has been found to be the key factor in determining the resultant morphology.

Read more for FREE at:

Help nanorods “stand” on microsubstrate to form hierarchical ZnO nanorod-nanosheet architectures
Jun Jiang, Feng Gu, Wei Shao, Lili Gai, Chunzhong Li and Guangjian Huang
CrystEngComm, 2011, Advance Article
DOI: 10.1039/C1CE05180F

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Hot Article: Cocrystals by halogen bonding

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This CrystEngComm Hot article investigates the formation of co-crystals from an isoindoline nitroxide and an iodoperfluorocarbon, and looks at the halogen bonding in the resulting crystals.

This is particularly interesting as organic spin systems such as this are of importance in the fields of spintronics and spin-based quantum computing. This method is fast and reliable, so the making of organic molecular magnetic materials is much easier.

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Read the full article for FREE to discover more about the way they prepared their x-bonding co-crystals…

Vapour phase assembly of a halogen bonded complex of an isoindoline nitroxide and 1,2-diiodotetrafluorobenzene
Karl J. P. Davy, John McMurtrie, Llew Rintoul, Paul V. Bernhardt and Aaron S. Micallef
CrystEngComm, 2011, DOI: 10.1039/C1CE05344B

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Hot Article: Green synthesis of PbS nanocrystals

In this CrystEngComm Hot Article, Hongzheng Chen and colleagues synthesized uniform PbS nanocrystals using a surfactant-free electrodeposition method.

They investigated the effect of the concentration of Cl ions, deposition time and applied deposition current in tuning the morphology of the crystals.

The authors believe the method could be extended to the shape-controlled synthesis of other semiconductor crystals, especially metal sulfides.

Read more for FREE:

Morphology evolution route of PbS crystals via environment-friendly electrochemical deposition
Weiming Qiu, Mingsheng Xu, Fei Chen, Xi Yang, Yaxiong Nan and Hongzheng Chen
CrystEngComm, 2011, Advance Article
DOI: 10.1039/C1CE05225J, Paper

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Hot Article: ZnS nanocrystals with a cone-shaped head

Masato Uehara and Hideaki Maeda look at unusually shaped zinc sulphide nanocrystals in this CrystEngComm Hot article.

The scientists from Japan, made ZnS nanocrystals with a conical head, rather than the expected truncated pyramid.

Read the full article for FREE to find our more about these interesting nanocrystals…

Structural characterization of ZnS nanocrystals with a conic head using HR–TEM and HAADF tomography
Masato Uehara, Yusuke Nakamura, Satoshi Sasaki, Hiroyuki Nakamura and Hideaki Maeda
CrystEngComm, 2011, DOI: 10.1039/C1CE05168G

This paper is building on the team’s earlier work, published in CrystEngComm earlier in the year:

Controlled synthesis and structural evolutions of ZnS nanodots and nanorods using identical raw material solution, M. Uehara, S. Sasaki, Y. Nakamura, C. G. Lee, K. Watanabe, H. Nakamura and H. Maeda
CrystEngComm, 2011, 13, 2973–2983

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Hot Article: Writing on fresnoite thin films

In this CrystEngComm Hot article, Michael Lorenz and colleagues from Universitat Leipzig have made fresnoite thin films, fused on various materials by pulsed laser deposition, for use in photonic applications.

The mineral fresnoite (Ba2TiSi2O8)was discovered in California in 1965, and has become increasingly interesting to chemists because of its luminescence, non-linear optic and ferroelectic properties. In this work the authors examine the understudied films of these minerals, focussing on their growth using pulsed laser deposition, which hasn’t been done before.

Lorenz and coworkers found that the fresnoite films had high photoluminescence intensity, and were able to use a laser to ‘write’ on the films, which induced local crystallisation. They think this will open the door for many applications of their films, including potentially ‘security features against product piracy or individualized branding of products’.

Read the full article for FREE to find out more about writing on the amorphous fresnoite films…

Fresnoite thin films grown by pulsed laser deposition: photoluminescence and laser crystallization
Alexander Müller, Michael Lorenz, Kerstin Brachwitz, Jörg Lenzner, Kai Mittwoch, Wolfgang Skorupa, Marius Grundmann and Thomas Höche
CrystEngComm, 2011, DOI: 10.1039/C1CE05265A

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May Crystal Clear: Royal Wedding Fever

This month’s crystal clear shows an indium nitride crystal taken from an article published in Issue 11 of CrystEngComm. We liked it because it looks like a classic engagement ring style diamond, which given our recent royal wedding is particularly striking!

The crystal was grown using gold nanoparticles as a catalyst and via a combination of vapour-liquid-solid and vapour-solid growth mechanisms. Indium nitride has potential for use in the semiconductor industry because of its bandgap of 0.7eV, and on this occasion the authors see these crystals being used in microcavity lasing.

Read the full article to find out more about these high quality indium nitride crystallites…

Vapor–liquid–solid meets vapor–solid growth mechanism for fabricating high quality indium nitride crystallites
Haibin Liu, Sishen Xie and Guosheng Cheng
CrystEngComm, 2011, 13, 3649-3652, DOI: 10.1039/C1CE05137G

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CrystEngComm poster prize at the American Crystallographic Association meeting in New Orleans

CrystEngComm will be sponsoring a poster prize at next weeks meeting of the American Crystallographic Association 2011, New Orleans, LA.

Find out more about the conference, or the American Crystallographic Association, who ‘promote interactions among scientists who study the structure of matter at atomic (or near atomic) resolution’

The program chair is Dr Christopher L. Cahill, read some of his recent work:

Combining coordination and supramolecular chemistry for the formation of uranyl-organic hybrid materials
Nicholas P. Deifel and Christopher L. Cahill, Chem. Commun., 2011, 47, 6114-6116

Uranyl triazolate formation via an in situ Huisgen 1,3-dipolar cycloaddition reaction
Karah E. Knope and Christopher L. Cahill, CrystEngComm, 2011, 13, 153-157

Homometallic UO22+ diphosphonates assembled under ambient and hydrothermal conditions
Karah E. Knope and Christopher L. Cahill, Dalton Trans., 2010, 39, 8319-8324

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Hot Article: Polyhedral 50-facet cuprous oxide crystals

In this CrystEngComm Hot Article, Shaodong Sun et al. prepared polyhedral 50-facet cuprous oxide crystals with high-index planes using a seed-mediated solution phase route.

Cuprous oxide is a p-type semiconductor with potential applications including solar energy conversion, catalysis, gas sensors and lithium-ion batteries.

The authors studied the growth mechanism of the crystals, which will aid the design and synthesis of new polyhedral cuprous oxide architectures.

They also studied the photocatalytic activity of the crystals in the degradation of Methyl Orange dye. The crystals with high-index facets exhibited higher catalytic activity than crystals with low-index facets.

Find out more for FREE until 15th June 2011:

Seed-mediated synthesis of polyhedral 50-facet Cu2O architectures
Shaodong Sun, Dongchu Deng, Chuncai Kong, Yang Gao, Shengchun Yang, Xiaoping Song, Bingjun Ding and Zhimao Yang
CrystEngComm, 2011, Advance Article
DOI: 10.1039/C1CE05243H, Communication

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